Sewing-machine feed



2 Sheets-Sheet 1.

(No Model.)

LN. KELLY. SEWING MACHINE FEED.

Patented Oct. 31, 1893.

N TOR A TTORNE Y1),

WITNESSES: ZCM

9m. t e e h S w e e h 2 Y L L E K N m (No-Model.)

SEWING MACHINE FEED.

Patented Oct. 31, 1893'.

INVENTOR W 2'. $11

' WITNESSES: 45m

ATTOHNEYJ 7 STATES PATENT OF ICE.

JOSEPH N. KELLY, OF ARLINGTON HEIGHTS, ILLINOIS.

SEWING-MACHINE FEED.

SPECIFICATION forming part of Letters Patent No. 507,737, dated October31, 1893.

'ApplioationfiledApiil 3, 1893. Serial 110.468,?72. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH N. KELLY, a citizen of theUnited States,residing at Arlington Heights,in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inSewing-Machine Feeds, of which the following is a specification.

My invention relates to improvements in sewlng machine feeds; and theobject of my invention is to provide a simple device capable of readyadjustment to vary the length of stroke of the feeding bar; theconstruction being such as to be readily adapted to machines of anydesired character.

My invention consists in the various constructions and combinations ofparts hereinafter described and pointed out the claims.

In the accompanying drawings Figure 1 is a partial sectional view of theupper portion of a sewing machine, showing the means for driving thefeeding mechanism. Fig. 2 is a sectional view of the plate, showing thefeed- 1ng bar and some of the attachments therefor. Fig. 3 is a bottomplan view of the bed plate, showing the arrangement of the feedoperating devices. Fig. 4 is a view in detail of the feeding bar. Fig. 5is a detail view of some of the operating parts. Fig. 6 is a view of thefeed operating shaft showing a slight modification.

Like parts are represented by similar letters of reference in theseveral views.

In the said drawings a, a, represents the frame or head of an ordinarysewing machine; a, is the main shaft thereof, to which power istransmitted from any suitable device in the ordinary manner.

a is the shuttle carrying device, which is driven from the shaft a, by avibrating lever 0. in the usual Way.

On the bottom of the frame or head a a, is a shaft I), supported insuitable bearings 12, b, and receiving a rotary motion from the shaft a,in any desired manner; a crank lever (7 being'illustrated for thispurpose in Fig. 1. The shaft b, I term the feed shaft. It is pro vidednear one end with a cam 6 and with an eccentrically arranged ball-shapedbearing b Arranged above the cam 6 at right angles to the shaft 6, isthe feed bar 0, adapted to move longitudinally in suitable bearingsupports 0, 0 at each end, and provided at one end with a slottedopening 0 adapted to slip over a pin 0 in the bearing 0 which permits alongitudinal movement of said bar in the bearings, at the same timeallowing it to rise and fall at one end on the pin 0 as a pivot.Connected adj ustably to the feed bar 0, is a bearing plate 0 the bottomof which has a bearing surface 0 in line with the cam 6 adapted tocontact therewith. Arranged parallel with this bearing surface 0 and onthe opposite side of the cam b therefrom, is a flexible cap or cover 0also secured to the bearing plate 0 this flexible cap or coverconsisting preferably of a flexible piece of steel or other suitablemetal, adapted to bear on the cam 5 and press the same firmly againstthe bearing plate 0 said flexible cover being adapted to compensate forany irregularity in a diametrical size of the cam.

Extending parallel with the shaft Z), is a longitudinally moving rod orshaft d, connected at one end to asliding head 01, having an upwardlyprojecting stud d which extends through the frame a, and is providedwith a clamping screw (1 by means of which the head may be clamped tothe frame and held in different positions of adjustment. This rod d,extends through a bearing d and is provided at the end with a socketbearing (1 adapted to receive a ball shaped journal e, on the end of avibrating arm or lever c. This shaft or pin e, is pivotally connected atits outer end to a link connection 6 also formed with a socket bearing awhich fits over the eccentric ball-shaped bearing 1), on the shaft b.Arranged loosely on the vibrating arm or lever e, is a ball-shapedbearing f, which fits in a corresponding socket 0 in the feed bar 0.

The operation of the device is as follows: A revolution of the shaft b,causes a Vertical vibrating movement of the feed bar through the mediumof the cam 19 A vibrating movement of the arm or lever e, is alsoproduced by the eccentric ball I), operating through the link 6 whichproduces a longitudinal movement of the feed bar, which is journaled onsaid arm or lever through the medium of the movable ball-bearing f. Theend of the arm or lever e, beingjournaled in the end of the rod (1, asliding movement of said rod changes the pivotal point of said arm orlever a, with reference to the feed bar, and thus changes the length ofstroke of the same; the ball joints described permitting the readyadjustment of the parts to any degree desirable.

In Fig. 3 I have shown the bearing Z) arranged back of the cam 6 and theball If. It is obvious, however, that this bearing may be arranged atany point. In Fig. 6 I have shown it arranged at the outer extremity ofthe shaft, with the ball I), between the hearing and the cam. Othermodifications of the arrangement may be made withoutdeparting from thespirit of my invention.

Having thus described my invention, I claim- 1. In a sewing machinefeed,the combination with the feeding bar and revolving shaft, a cam foroperating said feeding bar, a vibrating arm having a ball-shaped endjournaled in an adjustable bearing, a sliding ballshaped sleeve on saidarm journaled in said feed bar,and a connection from'said vibrating armto the cam on said shaft,substan- -tially as specified.

2. The combination with the feeding bar,

of a revolving shaft, a cam on said shaft, a-

vibrating arm connected to said earn, a ballshaped sleeve on said armjournaledin said feeding-bar, and an adjustable bearing for supportingthe end of said arm, whereby the samema'y be adjusted through saidsleeve, to vary the stroke of the feeding bar and means for giving arise and fall to said feed bar, substantially as specified.

3. The combination with the feeding bar, of a revolving shaft, a cam onsaid shaft to con tact with said bar and produce a vertical movementthereof, a vibrating arm having a ball-shaped end an adjustable bearingto support said arm, a ball-shaped sleeve loosely mounted on said arm,and a bearing for said sleeve in said feed bar, and means, substantiallyas described, for producing a vibratory movement of said arm from saidrevolving shaft, substantially as specified.

at. The combination with a revolving shaft, of the feeding bar having abearing surface, and an oppositely arranged yielding cap, a cam on saidshaft between said bearing and cap, a vibrating arm having a-universalhearing in said bar, an adjustable support for the end of said arm, anda connection from said arm to said shaft, adapted to prod ucea vibratorymovement thereof by the revolution of said shaft, substantiallyasspecified.

5. The combination with the revolving shaft I), feed bar a vibrating arme connection e cam 19 bearingf on said arm, adjustable bearing forsupporting said arm and means for giving a rise and fall motion to thefeed bar substantially. as and for the purpose specified.

In testimony whereofI-have hereunto set my hand this 29th day of March,A. D. 1893.

JOSEPH N. KELLY.

Witnesses:

LOUIE C. HAEFELI, FRED ILLovENznN.

